Tighten the clock period on designs with positive ws

[maliberty]

No description provided.

[gemini-code-assist]

Code Review

This pull request updates the clock period constraints across multiple designs (including aes-mbff, ibex, mock-cpu, uart-blocks, gcd, jpeg, cva6, and sky130hd) to tighten timing requirements, and corrects the SDC file path for the aes-mbff design. The review feedback highlights that reducing the clock period for the CVA6 design on Nangate45 from 1000 to 1.0 is overly aggressive and likely to cause severe timing violations, suggesting a more realistic value of 10.0 instead.

[openroad-ci]

🔍 QoR check

Metrics reflect the PR merge build — i.e. what will land on the target branch.

Commit 648662d · Jenkins build #1 · Baseline: build · View build on dashboard

62 design(s) checked — 9 with regression(s), 0 without a comparable baseline.

❌ asap7/aes-mbff base — 2 failing metric(s)

Metric	target	base	delta	limit	band
constraints__clocks__count	1	2	-50.0%	2	Direct 0%
globalroute__timing__setup__tns	-269.882	-2.43366	10989.552361463804%	-78.43366	PeriodPadding 20%

❌ asap7/ibex base — 4 failing metric(s)

Metric	target	base	delta	limit	band
cts__timing__setup__tns	-25560.4	0	—	-200.0	PeriodPadding 20%
finish__timing__setup__tns	-22264.4	0	—	-200.0	PeriodPadding 20%
globalroute__timing__setup__tns	-42980.7	-0.908162	4732612.886026942%	-200.908162	PeriodPadding 20%
globalroute__timing__setup__ws	-65.1011	-0.796807	8070.2469983320925%	-50.796807	PeriodPadding 5.0%

❌ asap7/mock-cpu base — 6 failing metric(s)

Metric	target	base	delta	limit	band
cts__timing__setup__tns	-252.167	0	—	-66.6	PeriodPadding 20%
cts__timing__setup__ws	-33.5438	2.69612	-1344.1508538195628%	-16.65	PeriodPadding 5.0%
finish__timing__setup__tns	-269.7	0	—	-66.6	PeriodPadding 20%
finish__timing__setup__ws	-33.658	12.8525	-361.87901186539585%	-16.65	PeriodPadding 5.0%
globalroute__timing__setup__tns	-348.256	0	—	-66.6	PeriodPadding 20%
globalroute__timing__setup__ws	-41.411	2.35761	-1856.4822001942646%	-16.65	PeriodPadding 5.0%

❌ gt2n/gcd base — 7 failing metric(s)

Metric	target	base	delta	limit	band
cts__timing__setup__tns	-786.696	0	—	-100.0	PeriodPadding 20%
cts__timing__setup__ws	-62.9036	158.356	-139.72290282654274%	-25.0	PeriodPadding 5%
finish__timing__setup__tns	-1187.76	0	—	-100.0	PeriodPadding 20%
finish__timing__setup__ws	-68.8317	150.061	-145.86914654707087%	-25.0	PeriodPadding 5%
globalroute__timing__setup__tns	-1187.75	0	—	-100.0	PeriodPadding 20%
globalroute__timing__setup__ws	-68.8299	150.061	-145.8679470348725%	-25.0	PeriodPadding 5%
placeopt__design__instance__area	21.5127	18.5432	16.013956598645326%	21.32468	Padding 15%

❌ gt2n/jpeg base — 4 failing metric(s)

Metric	target	base	delta	limit	band
cts__timing__setup__tns	-15681.9	0	—	-200.0	PeriodPadding 20%
cts__timing__setup__ws	-60.0663	131.953	-145.52098095534015%	-50.0	PeriodPadding 5%
finish__timing__setup__tns	-4650.05	0	—	-200.0	PeriodPadding 20%
globalroute__timing__setup__tns	-4617.66	0	—	-200.0	PeriodPadding 20%

❌ ihp-sg13g2/gcd base — 10 failing metric(s)

Metric	target	base	delta	limit	band
cts__timing__setup__tns	-6.49389	0	—	-0.56	PeriodPadding 20%
cts__timing__setup__ws	-0.215104	0.458359	-146.92915378556984%	-0.14	PeriodPadding 5.0%
detailedroute__route__wirelength	12010	9892	21.411241407197735%	11375.8	Padding 15%
finish__design__instance__area	6686.06	5189.18	28.846176081770146%	5967.557	Padding 15%
finish__timing__setup__tns	-6.98143	0	—	-0.56	PeriodPadding 20%
finish__timing__setup__ws	-0.239075	0.473577	-150.482814832646%	-0.14	PeriodPadding 5.0%
globalroute__timing__setup__tns	-12.1207	0	—	-0.56	PeriodPadding 20%
globalroute__timing__setup__ws	-0.397871	0.220928	-280.09079881228274%	-0.14	PeriodPadding 5.0%
placeopt__design__instance__area	5858.7	4944.24	18.49546138536964%	5685.876	Padding 15%
placeopt__design__instance__count__stdcell	510	400	27.5%	460.0	Padding 15%

❌ ihp-sg13g2/jpeg base — 5 failing metric(s)

Metric	target	base	delta	limit	band
cts__timing__setup__tns	-21.4754	0	—	-1.6	PeriodPadding 20%
cts__timing__setup__ws	-0.542417	0.935878	-157.95808855427737%	-0.4	PeriodPadding 5.0%
finish__timing__setup__tns	-3.82476	0	—	-1.6	PeriodPadding 20%
globalroute__timing__setup__tns	-48.242	0	—	-1.6	PeriodPadding 20%
placeopt__design__instance__count__stdcell	88817	76451	16.17506638238872%	87918.65	Padding 15%

❌ nangate45/cva6 base — 5 failing metric(s)

Metric	target	base	delta	limit	band
cts__timing__setup__tns	-5721.48	0	—	-200.0	PeriodPadding 20%
detailedroute__route__wirelength	2414976	2069992	16.66595812930678%	2380490.8	Padding 15%
finish__timing__setup__tns	-5764.63	0	—	-200.0	PeriodPadding 20%
globalroute__timing__setup__tns	-5855.95	0	—	-200.0	PeriodPadding 20%
placeopt__design__instance__count__stdcell	118614	100935	17.515232575419823%	116075.25	Padding 15%

❌ sky130hd/ibex base — 6 failing metric(s)

Metric	target	base	delta	limit	band
cts__timing__setup__tns	-403.299	0	—	-2.0	PeriodPadding 20%
cts__timing__setup__ws	-0.675496	0.00169686	-39908.58762655729%	-0.5	PeriodPadding 5.0%
finish__timing__setup__tns	-330.156	-1.92918	17013.799645445215%	-3.92918	PeriodPadding 20%
finish__timing__setup__ws	-0.607174	-0.106836	468.3234115841102%	-0.606836	PeriodPadding 5.0%
globalroute__timing__setup__tns	-594.81	-0.091509	649901.6391830312%	-2.091509	PeriodPadding 20%
globalroute__timing__setup__ws	-0.834436	-0.0305391	2632.3529508073257%	-0.5305391	PeriodPadding 5.0%